44213977891 has 8 divisors (see below), whose sum is σ = 44481338064. Its totient is φ = 43947254880.

The previous prime is 44213977889. The next prime is 44213977897. The reversal of 44213977891 is 19877931244.

44213977891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 44213977891 - 2¹ = 44213977889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44213977897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19720 + ... + 298021.

It is an arithmetic number, because the mean of its divisors is an integer number (5560167258).

Almost surely, 2^44213977891 is an apocalyptic number.

44213977891 is a deficient number, since it is larger than the sum of its proper divisors (267360173).

44213977891 is a wasteful number, since it uses less digits than its factorization.

44213977891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318581.

The product of its digits is 3048192, while the sum is 55.

The spelling of 44213977891 in words is "forty-four billion, two hundred thirteen million, nine hundred seventy-seven thousand, eight hundred ninety-one".